I'll be getting one for my 4DR once it's delivered. My thoughts have been similar to yours, but in my case it may be easier accessing from the back door.
In PA with a BD scheduled for week of 1/3. May be interested. Want to see how bad the clash with EG is when it arrives.
Obviously if you find a trade before that go for it.
See first post, table shows 2H/4A (if equipped)
https://www.bronco6g.com/forum/threads/g-o-a-t-breakdown-goat-drive-modes-availability-for-each-model-trim-projected.2521/
2 DR - https://accessories.ford.com/products/bronco-2dr-2021-trail-armor-rocker-panels-1
4 DR - https://accessories.ford.com/products/bronco-4dr-2021-trail-armor-rocker-panels-1
Not going to speak to quality or aftermarket vs OEM. Thread below discusses how to drastically reduce the cost of the OEM option.
https://www.bronco6g.com/forum/threads/solution-roof-rails-add-on-for-4-door-sas-2-7.28190/#post-965152